What is the formula of the net primary production?

441

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Explain the role of the ozone layer for the living beings?

331

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Explain some examples of interspecif competition?

386

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How does net primary production(npp) relate to the energy pyramids?

421

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Define selective waste collection?

351

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Can a tertiary consumer of one chain be a primary or secondary consumer of another chain?

329

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Explain how does biological diversity relate to the characteristics of the abiotic factors of an ecosystem?

435

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Define pollution?

336

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Explain how are the grasslands of north america and of south america respectively called?

429

---

Define dry mass?

484

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What is the respective importance of water for the living beings?

401

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Define ecological succession?

409

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Explain the typical conformation of the age pyramids of underdeveloped countries?

345

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Explain how are ecological interactions classified?

329

---

Define biologic control?

342

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